Hi, gang, My 300 H resto is progressing nicely. I'm at the point of installing the front and back glass. My original rubber gaskets are dirty and a little stiff but not cracked or deteriorated. I've heard many stories in the past about soaking them in something, but I forgot what that something is. Does anyone have any suggestions on what to use to soften and clean these rubbers ??? Thanks, Mark Souders Mohrsville, PA